The front office's focus right now should be how to maximize him going forward. Find the right players to put around him and figure out what players on the roster compliment him well.
I'm intrigued by the Barrett/Robinson pick and roll and i think Randle is a nice fit with him also.
That leaves 3 keepers in the starting 5. Morris and Payton are fine stopgaps but obviously not long-term solutions. Knox and Trier seem like nice scoring pieces off the bench for now. Frank can still be a nice backup PG who compliments Barrett. Smith probably can't. Brazdeikis and Dotson can be roster pieces but probably not rotation pieces.
For now i see 4 definites (MItch, Randle, Knox, and Trier) who make sense. But we need to be searching for a PG and wing.
Barrett is showing his ability as a 2-way play-making wing capable of being a top scoring option down the line. It's refreshing with how well Porzingis is playing in Dallas and how Zion is hurt, making the RJ pick make more and more sense every day. With the Porzingis sting still present, we needed another potential franchise player to ease the pain. Barrett seems like a hard working kid who has no red flags overall. The Knicks better not screw it up.